Cesarean Delivery of a Dichorionic Diamniotic Twin Pregnancy Complicated With a Complete Septate Uterus: A Case of Septum Perforation to Deliver the Trailing Twin.

A complete septate uterus, resulting from the abnormal fusion of the Müllerian ducts, is a rare uterine anomaly in which the uterine cavity is divided by a septum, resulting in two separate uterine cavities. In this case, we encountered a patient with a complete septate uterus complicated by a dichorionic diamniotic twin pregnancy, with each fetus developing in separate uterine cavities. During the course of the pregnancy, the placenta of the trailing twin (Twin B) was attached to the septum.

α,α'-Diarylacenaphtho[1,2-c]phosphole P-oxides: divergent synthesis and application to cathode buffer layers in organic photovoltaics.

A divergent method for the synthesis of α,α'-diarylacenaphtho[1,2-c]phosphole P-oxides has been established; α,α'-dibromoacenaphtho[c]phosphole P-oxide, which was prepared through a Ti(II)-mediated cyclization of 1,8-bis(trimethylsilylethynyl)naphthalene, underwent a Stille coupling with three different kinds of aryltributylstannanes to afford the α,α'-diarylacenaphtho[c]phosphole P-oxides in moderate to good yields. X-ray crystallographic analyses and UV/Vis absorption/fluorescence measurements have revealed that the degree of π-conjugation, the packing motif, the electron-accepting ability, and the thermal stability of the acenaphtho[c]phosphole π-systems are finely tunable with the α-aryl substituents. All the P=O and P=S derivatives exhibited high stability in their electrochemically reduced state.